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get.go
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get.go
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// Copyright 2020-2023 Buf Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package bufpluginconfig
import (
"context"
"fmt"
"io"
"github.com/bufbuild/buf/private/pkg/encoding"
"github.com/bufbuild/buf/private/pkg/storage"
"github.com/bufbuild/buf/private/pkg/stringutil"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/codes"
"go.uber.org/multierr"
)
func getConfigForBucket(ctx context.Context, readBucket storage.ReadBucket, options []ConfigOption) (_ *Config, retErr error) {
ctx, span := otel.GetTracerProvider().Tracer("bufbuild/buf").Start(ctx, "get_plugin_config")
defer span.End()
defer func() {
if retErr != nil {
span.RecordError(retErr)
span.SetStatus(codes.Error, retErr.Error())
}
}()
// This will be in the order of precedence.
var foundConfigFilePaths []string
// Go through all valid config file paths and see which ones are present.
// If none are present, return the default config.
// If multiple are present, error.
for _, configFilePath := range AllConfigFilePaths {
exists, err := storage.Exists(ctx, readBucket, configFilePath)
if err != nil {
return nil, err
}
if exists {
foundConfigFilePaths = append(foundConfigFilePaths, configFilePath)
}
}
switch len(foundConfigFilePaths) {
case 0:
// Did not find anything, return the default.
return newConfig(ExternalConfig{}, options)
case 1:
readObjectCloser, err := readBucket.Get(ctx, foundConfigFilePaths[0])
if err != nil {
return nil, err
}
defer func() {
retErr = multierr.Append(retErr, readObjectCloser.Close())
}()
data, err := io.ReadAll(readObjectCloser)
if err != nil {
return nil, err
}
return getConfigForDataInternal(
ctx,
encoding.UnmarshalYAMLNonStrict,
encoding.UnmarshalYAMLStrict,
data,
readObjectCloser.ExternalPath(),
options,
)
default:
return nil, fmt.Errorf("only one plugin file can exist but found multiple plugin files: %s", stringutil.SliceToString(foundConfigFilePaths))
}
}
func getConfigForData(ctx context.Context, data []byte, options []ConfigOption) (*Config, error) {
_, span := otel.GetTracerProvider().Tracer("bufbuild/buf").Start(ctx, "get_plugin_config_for_data")
defer span.End()
config, err := getConfigForDataInternal(
ctx,
encoding.UnmarshalJSONOrYAMLNonStrict,
encoding.UnmarshalJSONOrYAMLStrict,
data,
"Plugin configuration data",
options,
)
if err != nil {
span.RecordError(err)
span.SetStatus(codes.Error, err.Error())
}
return config, err
}
func getConfigForDataInternal(
ctx context.Context,
unmarshalNonStrict func([]byte, interface{}) error,
unmarshalStrict func([]byte, interface{}) error,
data []byte,
id string,
options []ConfigOption,
) (*Config, error) {
var externalConfigVersion externalConfigVersion
if err := unmarshalNonStrict(data, &externalConfigVersion); err != nil {
return nil, err
}
if err := validateExternalConfigVersion(externalConfigVersion, id); err != nil {
return nil, err
}
var externalConfig ExternalConfig
if err := unmarshalStrict(data, &externalConfig); err != nil {
return nil, err
}
return newConfig(externalConfig, options)
}
func validateExternalConfigVersion(externalConfigVersion externalConfigVersion, id string) error {
switch externalConfigVersion.Version {
case "":
return fmt.Errorf(
`%s has no version set. Please add "version: %s"`,
id,
V1Version,
)
case V1Version:
return nil
default:
return fmt.Errorf(
`%s has an invalid "version: %s" set. Please add "version: %s"`,
id,
externalConfigVersion.Version,
V1Version,
)
}
}